[iamtew]

On the topic of messaging, GitLab acquired Gitter about a year ago:

https://about.gitlab.com/2017/03/15/gitter-acquisition/

Edit: I first said "not too long ago" then realized it was just about a year ago.. Where is time going!?

[lloeki]

Also, omnibus GitLab includes Mattermost, and there are integrations between both (notifications, slash commands, auto channels...).